Mechanism for forming nipples on tubes



M. LOWY.

MECHANISM FOR FORMING NIPPLES 0N TUBES.

APPLICATION FILED APR 5. I92].

1 ,%32,@73u Patented 001:. 17, 11922.

W a INVE/I/TOR A TTOR/VEV I Patented Get. 17, 119220 UNHED STATES MORRISLOVIY, OF NEW YORK, N. Y.

MECHANISM FOR FORMING NIPPLES ON TUBES.

Application filed April 5,

To all whom it may concern.

Be it known that I, Moinns Lowr, a citizen of the United States, andresident of the city of New York, in the county of Kings and State ofNew York, have invented certain new and useful Improvements inMechanisms for Forming Nipples on Tubes, of which the following is aspecification.

The present invention relates to a mechanism for forming nipples orsmall tubular protuberances on tubes, and has for its main object toprovide a simple and efficient device of this type.

Another obj set of the invention is to produce a mechanism of thecharacter mentioned which is capable of being attached to punch-pressesof any preferred type, without necessitating material changes in theconstruction of the latter.

lVith these and other objects in view, which will more fully appear asthe nature of the invention is better understood, the same consists inthe combination, arrangement and construction of parts hereinafterdescribed, pointed out in the appended claims and illustrated in theaccompanying drawings, it being understood that many changes may be madein the size and proportion of the several parts and details ofconstruction within the scope of the ap pended claims, without departingfrom the spirit or sacrificing any of the advantages of the invention.

One of the many possible embodiments of the present invention isillustrated in the accompanyingdrawings, in which Figure 1 is a frontelevation, partly in section, of a nipple forming mechanism constructedin accordance with the present invention; Fig. 2 is a section taken (online 22 of Fig. 1; Fig. 3 is a view similar to the one shown in Fig. 1with the elements in other positions; and Fig. 4 is a section taken online 4-4 of Fig. 3.

In the drawings, the numeral 10 indicates a tubular block, over whichthe work, that is to say a tube 11, may be drawn, the outer diameter ofthe said block corresponding to the inner diameter of the work. Thisblock is fastened in any suitable manner to the work support of apunch-press, not shown, and is provided, in alignment with areciprocating die 12 on the punch press, with an a erture 13. Thisaperture extends radially is rough the block in vertical direc sphericalinner end 17.

1921. Serial No. 458,867.

tion and has reciprocably mounted therein a comblned piercing andforming die 14. The die 14 includes a cylindrical shank 15, having aconical outer end 16 and a hemi- The shank of the die 14 snugly fits theaperture 13, it having a diameter corresponding to the inner diameter ofthe tubular protuberance to be formed. In the block 10 is oscillatablymounted a spindle 18, provided with a peripheral cam groove 19, thatco-operates with the die 14. One end of the spindle extends beyond theblock 10 and has fixed to it an operating handle 20.

The die 14 constitutes the male die of the mechanism, while the die 12is a female die, it being provided with a cylindrical recess 21, thediameter of which corresponds to the outer diameter of the nipple to beformed.

The operation of this device is as follows: The tube 11, on which thenipple is to be formed, is drawn over the block 10, the die 14 beingdisposed wholly within the aperture 1 5. Any suitable age may be mountedupon the block or on the work support, in order to bring the work inproper relation to the dies. After the tube has been properly positionedon the block, the female die is forced against the work, the elementsbeing then in the positions shown in Figs. 1 and 2 of the drawings. Theoperator shifts then the handle 20 in the proper direction, to cause amovement of the spindle 18 around its axis in the direction of the arrowshown in Fig. 2 of the drawings, whereby the conical outer end 16 of thedie 14 pierces the tube 11 and, in the further movement of the said die,the shank of the die, in co-operation with the recess in the female die,forms a nipple 22 on the tube 11, said nipple projecting outwards, asclearly shown in Figs. 3 and 4 of the drawings. The cam groove in thespindle 18 is so shaped that a gradual and continuous outward movementof the die 14 is obtained. After the nipple has been so formed, thefemale die is caused to recede from the work and the operating han dle2O swung back to its original position, the die 14 moving downwardseither by gravity or, if necessary, by a force applied to the same bythe operator. The work may then be removed from the block 10.

What I claim is el. A. mechanism. for forming nipples on tubes,comprising a tubular block over which the work is adapted to be drawn,

said block being provided with a radial aperture, a combined piercingand forming die reciprocably mounted in said aperture, said die having ashank corresponding to the inner diameter of the nipple to be formed anda piercing outer end, a female die co-operating with saidfirst-mentioned die having a recess corresponding to the outer diameterof the nipple to be formed, and means disposed within said block forcausing a movement of said first-mentioned die toward and into saidfemale die.

2. A mechanism for forming nipples on tubes, comprising a tubular blockover Which the work is adapted to be drawn, said block being providedwith a radial aperture, a combined piercing and forming die reciprocablymounted in said aperture, said die having a shank corresponding to theinner diameter of the nipple to be formed and a piercing outer end, afemale die co-operating with said first-mentioned die having a recesscorresponding to the outer diameter of the nipple to be formed, aspindle oscillatably mounted in said block having a cam groove adaptedto co-Operate with said firstmentioned dle for causing 'a movementthereof toward and into said female die.

Signed at New York, in the county of New York and State of New York,this 23rd day of March, 1921.

MORRIS LOWY.

